<template>
  <section class="main">
    <div class="crumbs">
      <el-breadcrumb separator="/">
        <el-breadcrumb-item>
          <i class="el-icon-rank"></i> 拖拽组件
        </el-breadcrumb-item>
        <el-breadcrumb-item>拖拽排序</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="container">
      <div class="plugins-tips">
        Vue.Draggable：基于 Sortable.js 的 Vue 拖拽组件。
        访问地址：
        <a href="https://github.com/SortableJS/Vue.Draggable" target="_blank">Vue.Draggable</a>
      </div>
      <div class="drag-box">
        <div class="drag-box-item">
          <div class="item-title">todo</div>
          <draggable v-model="todo" @remove="removeHandle" :options="dragOptions">
            <transition-group tag="div" id="todo" class="item-ul">
              <div v-for="item in todo" class="drag-list" :key="item.id">{{item.content}}</div>
            </transition-group>
          </draggable>
        </div>
        <div class="drag-box-item">
          <div class="item-title">doing</div>
          <draggable v-model="doing" @remove="removeHandle" :options="dragOptions">
            <transition-group tag="div" id="doing" class="item-ul">
              <div v-for="item in doing" class="drag-list" :key="item.id">{{item.content}}</div>
            </transition-group>
          </draggable>
        </div>
        <div class="drag-box-item">
          <div class="item-title">done</div>
          <draggable v-model="done" @remove="removeHandle" :options="dragOptions">
            <transition-group tag="div" id="done" class="item-ul">
              <div v-for="item in done" class="drag-list" :key="item.id">{{item.content}}</div>
            </transition-group>
          </draggable>
        </div>
      </div>
    </div>
  </section>
</template>

<script>
// import draggable from 'vuedraggable'
export default {
  name: 'draglist',
  data() {
    return {
      dragOptions: {
        animation: 120,
        scroll: true,
        group: 'sortlist',
        ghostClass: 'ghost-style'
      },
      todo: [
        {
          id: 1,
          content: '开发图表组件'
        },
        {
          id: 2,
          content: '开发拖拽组件'
        },
        {
          id: 3,
          content: '开发权限测试组件'
        }
      ],
      doing: [
        {
          id: 1,
          content: '开发登录注册页面'
        },
        {
          id: 2,
          content: '开发头部组件'
        },
        {
          id: 3,
          content: '开发表格相关组件'
        },
        {
          id: 4,
          content: '开发表单相关组件'
        }
      ],
      done: [
        {
          id: 1,
          content: '初始化项目，生成工程目录，完成相关配置'
        },
        {
          id: 2,
          content: '开发项目整体框架'
        }
      ]
    }
  },
  components: {
    draggable
  },
  methods: {
    removeHandle(event) {
      console.log(event);
      this.$message.success(`从 ${event.from.id} 移动到 ${event.to.id} `);
    }
  }
}

</script>

<style scoped>
.drag-box {
  display: flex;
  user-select: none;
}
.drag-box-item {
  flex: 1;
  max-width: 330px;
  min-width: 300px;
  background-color: #eff1f5;
  margin-right: 16px;
  border-radius: 6px;
  border: 1px #e1e4e8 solid;
}
.item-title {
  padding: 8px 8px 8px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: #24292e;
  font-weight: 600;
}
.item-ul {
  padding: 0 8px 8px;
  height: 500px;
  overflow-y: scroll;
}
.item-ul::-webkit-scrollbar {
  width: 0;
}
.drag-list {
  border: 1px #e1e4e8 solid;
  padding: 10px;
  margin: 5px 0 10px;
  list-style: none;
  background-color: #fff;
  border-radius: 6px;
  cursor: pointer;
  -webkit-transition: border 0.3s ease-in;
  transition: border 0.3s ease-in;
}
.drag-list:hover {
  border: 1px solid #20a0ff;
}
.drag-title {
  font-weight: 400;
  line-height: 25px;
  margin: 10px 0;
  font-size: 22px;
  color: #1f2f3d;
}
.ghost-style {
  display: block;
  color: transparent;
  border-style: dashed;
}
</style>
